Should they be allowed to stay? A group of sneaky snakes from warmer climes is seeking refuge in insulated Welsh walls and lofts. Some say it should make us reflect on how our changing world is disrupting nature.
The wild snakes invading Welsh homes
Good neighbours: Aesculapian snakes seem to coexist happily with normal suburban wildlife, and there are no indications that their presence is affecting native species. Glossary
Extinct - A species that no longer has any living members.